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| kererū | |
|---|---|
| Name | Kererū |
| Status | NT |
| Status system | IUCN3.1 |
| Genus | Hemiphaga |
| Species | novaeseelandiae |
| Authority | (Gmelin, 1789) |
kererū The kererū is a large forest pigeon endemic to Aotearoa New Zealand, notable for its iridescent plumage and role as a principal native frugivore. It is integral to the ecology of New Zealand's native forests and features in the cultural traditions of Māori, the works of early naturalists such as Joseph Banks and Georg Forster, and the conservation efforts led by organizations like Department of Conservation (New Zealand). Scientific study of the species intersects with research at institutions including University of Auckland, Victoria University of Wellington, and Massey University.
The species was described by Johann Friedrich Gmelin in 1789 and placed in the genus Hemiphaga; taxonomic assessment involves comparison with related genera such as Carpophaga and Caloenas. Early collectors including Captain James Cook and illustrators like Sydney Parkinson contributed specimens and plates used in taxonomy. Subspecies and regional variants have been evaluated in journals edited by scholars from Royal Society Te Apārangi and discussed at meetings of the Ornithological Society of New Zealand. Nomenclatural history references specimen catalogs from museums such as Natural History Museum, London and collections at Te Papa Tongarewa.
The kererū is a heavy-bodied pigeon with metallic green and bronze upperparts and a conspicuous white belly; plumage descriptions appear in field guides by authors associated with Auckland War Memorial Museum and Te Papa. Morphometrics have been recorded in studies by researchers at Lincoln University and University of Otago, showing sexual dimorphism noted in monographs produced by Birds New Zealand. Flight characteristics are compared to other Columbidae represented in collections at Smithsonian Institution and American Museum of Natural History.
Historically widespread across islands documented in accounts by James Cowan and explorers of the Marlborough Sounds, kererū currently occupy remaining native forests, podocarp-broadleaf remnants, suburban gardens in Wellington, Auckland, and Christchurch, and offshore islands such as Stewart Island / Rakiura and the Chatham Islands where translocations have been trialed. Habitat use is studied in landscape ecology projects funded by agencies like Ministry for Primary Industries (New Zealand) and NGOs including Forest & Bird. Range maps are compiled with data from citizen science platforms associated with eBird and regional surveys coordinated by Auckland Council.
Kererū movement ecology has been tracked using telemetry methods developed by researchers at University of Canterbury and Massey University, revealing patterns of nomadism linked to masting by trees documented by botanists at Landcare Research. Social behavior, flocking, and conspicuous wingbeats are described in observational studies in reserves such as Tiritiri Matangi Island and Zealandia. Predation and nest success are affected by introduced mammals managed under programs by Predator Free 2050 Ltd and local groups like Mainland Island initiatives.
As a primary frugivore, kererū consume fruits from canopy species including tawa, kahikatea, karaka, and taraire, with dietary studies published in journals affiliated with Massey University and Victoria University of Wellington. Seed dispersal effectiveness has been quantified in collaboration with ecologists at Landcare Research and conservationists from The Orana Wildlife Trust, demonstrating roles in regenerating forests on restoration projects at Mount Maunganui and Coromandel Peninsula. Seasonal shifts in food availability are correlated with flowering and fruiting phenologies monitored by botanists at Forest Research Institute.
Breeding biology, clutch size, and parental care have been documented by field researchers operating in study sites such as Kaikōura, Pureora Forest Park, and Whangarei Heads. Nest site selection and incubation behaviour are subjects of theses from University of Waikato and reports by the Wildlife Act 1953 compliance teams when dealing with protected species issues. Juvenile development, fledging intervals, and survivorship metrics inform population models used by planners at Department of Conservation (New Zealand) and regional councils.
The kererū faces threats from habitat loss recorded in land-use analyses by Ministry for the Environment (New Zealand), predation by introduced species such as Pacific rat and stoat, and historic hunting documented in colonial records housed at Alexander Turnbull Library. Conservation measures include predator control trials by groups like Project Janszoon and community-led initiatives coordinated with Forest & Bird and Te Ataarangi Rūnanga. Legal protections derive from statutes administered by Department of Conservation (New Zealand) and environmental policy influenced by cases heard in the Environment Court of New Zealand. Ongoing monitoring programs engage citizen scientists through partnerships with Birds New Zealand and academic researchers at Lincoln University.